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            <small>
              <a href="#Procedure">Procedure<br></a>
              <a href="#Abstract">Abstract<br></a>
              <a href="#Required_Reading">Required_Reading<br></a>
              <a href="#Keywords">Keywords<br></a>
              <a href="#Brief_I/O">Brief_I/O<br></a>
              <a href="#Detailed_Input">Detailed_Input<br></a>

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              <small>               <a href="#Detailed_Output">Detailed_Output<br></a>
              <a href="#Parameters">Parameters<br></a>
              <a href="#Exceptions">Exceptions<br></a>
              <a href="#Files">Files<br></a>
              <a href="#Particulars">Particulars<br></a>
              <a href="#Examples">Examples<br></a>

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              <small>               <a href="#Restrictions">Restrictions<br></a>
              <a href="#Literature_References">Literature_References<br></a>
              <a href="#Author_and_Institution">Author_and_Institution<br></a>
              <a href="#Version">Version<br></a>
              <a href="#Index_Entries">Index_Entries<br></a>
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<h4><a name="Procedure">Procedure</a></h4>
<PRE>
   void vlcom3_c ( SpiceDouble        a, 
                   ConstSpiceDouble   v1 [3], 
                   SpiceDouble        b, 
                   ConstSpiceDouble   v2 [3], 
                   SpiceDouble        c, 
                   ConstSpiceDouble   v3 [3], 
                   SpiceDouble        sum[3]  ) 

</PRE>
<h4><a name="Abstract">Abstract</a></h4>
<PRE>
 
   This subroutine computes the vector linear combination 
   a*v1 + b*v2 + c*v3 of double precision, 3-dimensional vectors. 
 </PRE>
<h4><a name="Required_Reading">Required_Reading</a></h4>
<PRE>
 
   None. 
 </PRE>
<h4><a name="Keywords">Keywords</a></h4>
<PRE>
 
   VECTOR 
 

</PRE>
<h4><a name="Brief_I/O">Brief_I/O</a></h4>
<PRE>
 
   VARIABLE  I/O  DESCRIPTION 
   --------  ---  -------------------------------------------------- 
   a          I   Coefficient of v1 
   v1         I   Vector in 3-space 
   b          I   Coefficient of v2 
   v2         I   Vector in 3-space 
   c          I   Coefficient of v3 
   v3         I   Vector in 3-space 
   sum        O   Linear Vector Combination a*v1 + b*v2 + c*v3 
 </PRE>
<h4><a name="Detailed_Input">Detailed_Input</a></h4>
<PRE>
 
   a     is a double precision number. 
 
   v1    is a double precision 3-dimensional vector. 
 
   b     is a double precision number. 
 
   v2    is a double precision 3-dimensional vector. 
 
   c     is a double precision number. 
 
   v3    is a double precision 3-dimensional vector. 
 </PRE>
<h4><a name="Detailed_Output">Detailed_Output</a></h4>
<PRE>
 
   sum   is a double precision 3-dimensional vector which contains 
         the linear combination a*v1 + b*v2 + c*v3 
 </PRE>
<h4><a name="Parameters">Parameters</a></h4>
<PRE>
 
   None. 
 </PRE>
<h4><a name="Exceptions">Exceptions</a></h4>
<PRE>
 
   Error free. 
 </PRE>
<h4><a name="Files">Files</a></h4>
<PRE>
 
   None. 
 </PRE>
<h4><a name="Particulars">Particulars</a></h4>
<PRE>
 
   For each index from 0 to 2, this routine implements in FORTRAN 
   code the expression: 
 
   sum[i] = a*v1[i] + b*v2[i] + c*v3[i] 
 
   No error checking is performed to guard against numeric overflow. 
 </PRE>
<h4><a name="Examples">Examples</a></h4>
<PRE>
 
   Often one has the components (a,b,c) of a vector in terms 
   of a basis v1, v2, v3.  The vector represented by (a,b,c) can 
   be obtained immediately from the call 
 
   <b>vlcom3_c</b> ( a, v1, b, v2, c, v3,   VECTOR ) 
 </PRE>
<h4><a name="Restrictions">Restrictions</a></h4>
<PRE>
 
   None. 
 </PRE>
<h4><a name="Literature_References">Literature_References</a></h4>
<PRE>
 
   None. 
 </PRE>
<h4><a name="Author_and_Institution">Author_and_Institution</a></h4>
<PRE>
 
   W.L. Taber      (JPL) 
   E.D. Wright     (JPL)
 </PRE>
<h4><a name="Version">Version</a></h4>
<PRE>
 
   -CSPICE Version 1.1.0, 22-OCT-1998 (NJB)

      Made input vectors const.

   -CSPICE Version 1.0.0, 08-FEB-1998 (EDW)
</PRE>
<h4><a name="Index_Entries">Index_Entries</a></h4>
<PRE>
 
   linear combination of three 3-dimensional vectors 
 </PRE>
<h4>Link to routine vlcom3_c source file <a href='../../../src/cspice/vlcom3_c.c'>vlcom3_c.c</a> </h4>

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   <pre>Wed Jun  9 13:05:32 2010</pre>

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